Both the 360 and PS3 have somewhat abandoned each of their previous systems whereas the Wii plays gamecube games and emus stuff older than that. That puts in on par with the Atari 7800 and the PS2, the other backwards compatible systems I can think off off the top of my head. How many Xbox games lack compatibility still? And the PS3 took out the PS2 "innards" entirely.

Nintendo is plenty wrong for the Wii controller situation, don't get me wrong, I am just saying every system is doing this kind of stuff now.

I remember people being miffed when they couldn'tbring over their NES cartridges to the next level.